(n.)
Any of several awards given annually by the Science Fiction and Fantasy Writers of America for excellence in science fiction and fantasy writing.
1966 SFWA Bulletin (Apr.) № 1: "Nebula" Awards for the best science fiction of 1965 were presented on March 11.
1972 H. Ellison Intro. to Mathoms from Time Closet Again, Dangerous Visions № 124: Isaac Asimov had been pressed into service at the last moment to read the winners of the Nebulas.
1987 Bookseller (Aug. 28) № 913/2: A first novel, William Gibson's Neuromancer, won both the Nebula and the Hugo awards in 1985.
2001 SF Chronicle (July) № 36/2: The Nebula is most like the Oscar and is given by professionals, others who are slapping each other on the back.